Dragon pox is a potentially fatal contagious disease that occurs in wizards and witches. Its symptoms are presumably similar to Muggle illnesses like smallpox and chickenpox. However, in addition to leaving the victim's skin pockmarked, dragon pox causes a lasting greenish tinge.[1] Simpler cases present with a green-and-purple rash between the toes and sparks coming out of the nostrils when the patient sneezes.[2]